male reproductive system
DESCRIPTION
MALE REPRODUCTIVE SYSTEM. MALE REPRODUCTIVE SYSTEM. TO REVIEW THE COMPONENTS OF THE MALE REPRODUCTIVE SYSTEM. TO CHARACTERIZE THE GENERAL ORGANIZATION OF THE TESTIS. TO UNDERSTAND THE HORMONAL REGULATION AND PROCESS OF SPERMATOGENESIS. - PowerPoint PPT PresentationTRANSCRIPT
MALE REPRODUCTIVE SYSTEMMALE REPRODUCTIVE SYSTEM
TO REVIEW THE COMPONENTS OF THE MALE REPRODUCTIVE SYSTEM
TO REVIEW THE COMPONENTS OF THE MALE REPRODUCTIVE SYSTEM
TO UNDERSTAND THE HORMONAL REGULATION AND PROCESS OF SPERMATOGENESIS
TO UNDERSTAND THE HORMONAL REGULATION AND PROCESS OF SPERMATOGENESIS
TO IDENTIFY THE HISTOLOGY OF THE REPRODUCTIVE TRACT AND ACCESSORY GLANDS
TO IDENTIFY THE HISTOLOGY OF THE REPRODUCTIVE TRACT AND ACCESSORY GLANDS
TO CHARACTERIZE THE GENERAL ORGANIZATION OF THE TESTIS
TO CHARACTERIZE THE GENERAL ORGANIZATION OF THE TESTIS
MALE REPRODUCTIVE SYSTEMMALE REPRODUCTIVE SYSTEM
MALE REPRODUCTIVE SYSTEM
TESTES
EPIDIDYMIS
VAS DEFERENS
SEMINAL VESICLES
PROSTATE
BULBOURETHRAL GLANDS
URETHRA
MALE REPRODUCTIVE SYSTEM
TESTIS
- thick connective tissue capsule- connective tissue septa divide
testis into 250 lobules
TUNICA ALBUGINEA
(1) SEMINIFEROUS TUBULES(1) SEMINIFEROUS TUBULES
- each lobule contains 1-4 seminiferous tubules and interstitial connective tissue
- produce sperm
INTERSTITIAL TISSUE
- contains Leydig cells which produce testosterone
(2) RECTUS TUBULES(2) RECTUS TUBULES
(3) RETE TESTIS(3) RETE TESTIS
(4) EFFERENT DUCTULES(4) EFFERENT DUCTULES
(5) EPIDIDYMIS(5) EPIDIDYMIS
TESTIS
MALE REPRODUCTIVE SYSTEM
EPIDIDYMIS
TUNICA ALBUGINEA
Mediastinum containing
RETE TESTIS
LOBULES
TESTIS H&ETESTIS H&E
SEMINIFEROUS TUBULESSEMINIFEROUS TUBULES
SEMINIFEROUS TUBULESSEMINIFEROUS TUBULES
INTERSTITIAL CONN. TISSUEINTERSTITIAL CONN. TISSUE
TESTIS H&ETESTIS H&E
SEMINIFEROUS TUBULESSEMINIFEROUS TUBULES
TESTIS H&ETESTIS H&E
SEMINIFEROUS TUBULESSEMINIFEROUS TUBULES
SEMINIFEROUS TUBULES
SEMINIFEROUS TUBULES
INTERSTITIAL CONN. TISSUEINTERSTITIAL CONN. TISSUE
TESTIS
MALE REPRODUCTIVE SYSTEM
TUNICA VAGINALIS
TUNICA ALBUGINEA
SEMINIFEROUS TUBULES
SEMINIFEROUS EPITHELIUMSEMINIFEROUS EPITHELIUM
- complex stratified epithelium containing two basic cell populations:
(1) SPERMATOGENIC CELLS
(2) SERTOLI CELLS
TESTIS
MALE REPRODUCTIVE SYSTEM
SEMINIFEROUS TUBULES
SEMINIFEROUS EPITHELIUMSEMINIFEROUS EPITHELIUM
- complex stratified epithelium containing two basic cell populations:
(1) SPERMATOGENIC CELLS
(2) SERTOLI CELLS
stem cells which regularly replicate and differentiate into mature sperm as they migrate toward the lumen
nonreplicating physical support cells
INTERSTITIAL CONNECTIVE TISSUEINTERSTITIAL CONNECTIVE TISSUE
(1) LEYDIG CELLS
produce and release testosterone
MALE REPRODUCTIVE SYSTEM
SERTOLI CELLS
SERTOLI CELLS
SPERMATOGONIASPERMATOGONIA
1º SPERMATOCYTE1º SPERMATOCYTE
2º SPERMATOCYTE2º SPERMATOCYTE
SPERMATIDSSPERMATIDS
SPERMATOGENESISSPERMATOGONIASPERMATOGONIA 1º SPERMATOCYTE1º SPERMATOCYTE 2º SPERMATOCYTE2º SPERMATOCYTE SPERMATIDSSPERMATIDS
SERTOLI CELLS:SERTOLI CELLS:
- columnar with adjoining lateral processes- columnar with adjoining lateral processes
- Sertoli-Sertoli junctions divide seminiferous tubules into basal and adluminal compartments
- Sertoli-Sertoli junctions divide seminiferous tubules into basal and adluminal compartments
- extend from basal lamina to lumen- extend from basal lamina to lumen
MALE REPRODUCTIVE SYSTEM
SEMINIFEROUS TUBULES SPERMATOGENESISTHREE PHASES:
(1) Spermatogonial Phase (Mitosis)
- spermatogonia proliferate by mitotic divisions to provide stem cells and cells which will proceed through spermatogenesis (1º spermatocytes)
(2) Spermatocyte Phase (Meiosis)
- diploid cells (2n) created in spermatogonial phase give rise to haploid cells (1n)
- Meiosis I (reduction division) & Meiosis II (equatorial division)
- 1º spermatocytes enter Meiosis I to form 2º spermatocytes which then enter Meiosis II and result in spermatids
(3) Spermatid Phase (Spermiogenesis)
- spermatid differentiation into spermatazoa
MALE REPRODUCTIVE SYSTEM
SPERMATOGENESISTHREE PHASES:
(1) Spermatogonial Phase (Mitosis)
(2) Spermatocyte Phase (Meiosis)
(3) Spermatid Phase (Spermiogenesis)
- acrosome formation; golgi granules fuse to form acrosome that contains hydrolytic enzymes which will enable the spermatozoa to move through the investing layers of the oocyte
- flagellum formation; centrioles and associate axoneme (arrangement of microtubules in cilia)
- changes in size and shape of nucleus; chromatin condenses and shedding of residual body (cytoplasm)
MALE REPRODUCTIVE SYSTEM
SPERMIOGENESISMature sperm 60µm long and acquire full motility in epididymis
(1) HEAD
(2) NECK
(3) TAIL
- nucleus and acrosome
- centriole and connecting piece
- middle piece(axoneme, outer dense fibers, mitochondial sheath)
- principal piece
(axoneme, outer dense fibers, fibrous sheath)
- end piece
(axoneme)
MALE REPRODUCTIVE SYSTEM
SPERMIOGENESIS
MALE REPRODUCTIVE SYSTEM
HORMONAL REGULATION OF MALE REPRODUCTIVE FUNCTION
HYPOTHALAMUS REGULATES ACTIVITY OF ANTERIOR PITUITARY (ADENOHYPOPHYSIS)
ADENOHYPOPHYSIS SYNTHESIZES HORMONES (LH and FSH) THAT MODULATE ACTIVITY OF SERTOLI AND LEYDIG CELLS
Luteinizing Hormone (LH): stimulates testosterone production by Leydig cells
Follicle Stimulating Hormone (FSH): stimulates production of sperm in conjunction with testosterone by regulating activity of Sertoli cells
SERTOLI CELLS STIMULATED BY FSH AND TESTOSTERONE RELEASE ANDROGEN BINDING PROTEIN WHICH BINDS TESTOSTERONE; THEREBY INCREASING TESTOSTERONE CONCENTRATION WITHIN THE SEMINIFEROUS TUBULES AND STIMULATING SPERMATOGENESIS
SERTOLI CELLS STIMULATED BY FSH AND TESTOSTERONE RELEASE ANDROGEN BINDING PROTEIN WHICH BINDS TESTOSTERONE; THEREBY INCREASING TESTOSTERONE CONCENTRATION WITHIN THE SEMINIFEROUS TUBULES AND STIMULATING SPERMATOGENESIS
MALE REPRODUCTIVE SYSTEM
TESTIS
- thick connective tissue capsule- connective tissue septa divide
testis into 250 lobules
TUNICA ALBUGINEA
(1) SEMINIFEROUS TUBULES(1) SEMINIFEROUS TUBULES
- each lobule contains 1-4 seminiferous tubules and interstitial connective tissue
- produce sperm
INTERSTITIAL TISSUE
- contains Leydig cells which produce testosterone
(2) RECTUS TUBULES(2) RECTUS TUBULES
(3) RETE TESTIS(3) RETE TESTIS
(4) EFFERENT DUCTULES(4) EFFERENT DUCTULES
(5) EPIDIDYMIS(5) EPIDIDYMIS
EPIDIDYMISEPIDIDYMIS
EFFERENT DUCTULESEFFERENT DUCTULES
MALE REPRODUCTIVE SYSTEM
EFFERENT DUCTULES
IRREGULAR LUMINAL APPEARANCE DUE TO TALL CILIATED CELLS AND SHORT NON-CILIATED CELLS
CONNECT RETE TESTIS WITH EPIDIDYMIS
CILIATED CELLS BEAT TOWARD EPIDIDYMIS; THIN LAYER OF SMOOTH MUSCLE ALSO AIDS MOVEMENT INTO EPIDIDYMIS
EPIDIDYMIS
MALE REPRODUCTIVE SYSTEM
RECEIVES EFFERENT DUCTULES
DIVIDED INTO HEAD, BODY, AND TAIL
PSEUDOSTRATIFIED EPITHELIUM CONSISTING OF PRINCIPAL AND BASAL CELLS
SMOOTH MUSCLE IN HEAD AND TAIL CONTRACT SPONTANEOUSLY; SMOOTH MUSCLE IN TAIL REQUIRES SYMPATHETIC INNERVATION FOR CONTRACTION
EPIDIDYMISEPIDIDYMIS
STEREOCILIASTEREOCILIA
MATURE SPERMMATURE SPERM
EPIDIDYMISEPIDIDYMISEFFERENT DUCTULESEFFERENT DUCTULES
EPIDIDYMISEPIDIDYMIS
EFFERENT DUCTULESEFFERENT DUCTULES
EPIDIDYMISEPIDIDYMIS
VAS DEFERENS
MALE REPRODUCTIVE SYSTEM
CONNECTS EPIDIDYMIS WITH SEMINAL VESICLES
SMOOTH MUSCLE ARRANGED IN 3 LAYERS
SMOOTH MUSCLE CONTRACTION VIA SYMPATHETIC STIMULATION DURING EJACULATION
PSEUDOSTRATIFIED COLUMNAR EPITHELIUM
MALE REPRODUCTIVE SYSTEM
VAS DEFERENS
VAS DEFERENS H&EVAS DEFERENS H&E
SEMINAL VESICLES
MALE REPRODUCTIVE SYSTEM
MUCOSA HIGHLY FOLDED
EPITHELIUM PSEUDOSTRATIFIED
SECRETIONS ARE HIGH IN FRUCTOSE AND BASIC
REGULAR SMOOTH MUSCLE CONTRACTS DURING EJACULATION
MALE REPRODUCTIVE SYSTEM
SEMINAL VESICLES
EPITHELIUM PSEUDOSTRATIFIED
PROSTATE
MALE REPRODUCTIVE SYSTEM
SIMPLE OR PSEUDOSTRATIFIED COLUMNAR EPITHELIUM
30-50 TUBULOALVEOLAR GLANDS WHICH EMPTY INTO URETHRA
PROSTATIC SECRETIONS RICH IN CITRIC ACID, ACID PHOSPHATASE, AND PROTEOLYTIC ENZYMES
MALE REPRODUCTIVE SYSTEM
PROSTATE
SIMPLE OR PSEUDOSTRATIFIED COLUMNAR EPITHELIUM
MALE REPRODUCTIVE SYSTEM
PROSTATE
PROSTATIC CONCRETIONS
- precipitation of secretory product
MALE REPRODUCTIVE SYSTEM
URETHRA
PROSTATIC, MEMBRANOUS, SPONGY (PENILE)
PENISPENIS
CCCC CCCC
CSCS
URETHRAURETHRA
PENISPENIS
ERECTILE BODIES
ERECTILE BODIES